TY - JOUR
T1 - Improved high Q value of CaTiO3-Ca(Mg1/3Nb2/3)O3 solid solution with near zero temperature coefficient of resonant frequency
AU - Huang, Cheng Liang
AU - Chen, Hui Liang
AU - Wu, Chen Cher
N1 - Funding Information:
This work was supported by the National Science Council of the Republic of China under Grant NSC-89-2216-E-006-066.
PY - 2001/7
Y1 - 2001/7
N2 - The crystal structures and the microwave dielectric properties of (1-x)CaTiO3-xCa(Mg1/3Nb2/3)O3 perovskite ceramic system have been investigated. (1-x)CaTiO3-xCa(Mg1/3Nb2/3)O3 solid solution exhibited orthorhombic crystal structures for all compositions. With x = 0.66, a new microwave dielectric ceramic material 0.34CaTiO3-0.66Ca(Mg1/3Nb2/3)O3 applicable to microwave devices is suggested and possesses the dielectric properties of a dielectric constant εr ∼ 48, a Q×f values ∼ 32,500 (at 6.7 GHz) and a τf value ∼-2 ppm/°C at 1450°C for 3 h. Further improvement of the Q×f value can be achieved by extending the sintering time to 6 h. It reveals a higher Q×f value of 34,000 (at 6.7 GHz) without degrading other microwave dielectric properties of 0.34CaTiO3-0.66Ca(Mg1/3Nb2/3)O3 ceramics.
AB - The crystal structures and the microwave dielectric properties of (1-x)CaTiO3-xCa(Mg1/3Nb2/3)O3 perovskite ceramic system have been investigated. (1-x)CaTiO3-xCa(Mg1/3Nb2/3)O3 solid solution exhibited orthorhombic crystal structures for all compositions. With x = 0.66, a new microwave dielectric ceramic material 0.34CaTiO3-0.66Ca(Mg1/3Nb2/3)O3 applicable to microwave devices is suggested and possesses the dielectric properties of a dielectric constant εr ∼ 48, a Q×f values ∼ 32,500 (at 6.7 GHz) and a τf value ∼-2 ppm/°C at 1450°C for 3 h. Further improvement of the Q×f value can be achieved by extending the sintering time to 6 h. It reveals a higher Q×f value of 34,000 (at 6.7 GHz) without degrading other microwave dielectric properties of 0.34CaTiO3-0.66Ca(Mg1/3Nb2/3)O3 ceramics.
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U2 - 10.1016/S0025-5408(01)00652-3
DO - 10.1016/S0025-5408(01)00652-3
M3 - Article
AN - SCOPUS:0035398553
SN - 0025-5408
VL - 36
SP - 1645
EP - 1652
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 9
ER -